3561095558081 has 2 divisors, whose sum is σ = 3561095558082. Its totient is φ = 3561095558080.

The previous prime is 3561095558039. The next prime is 3561095558093. The reversal of 3561095558081 is 1808555901653.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3538762945600 + 22332612481 = 1881160^2 + 149441^2 .

It is an emirp because it is prime and its reverse (1808555901653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3561095558081 - 2³⁰ = 3560021816257 is a prime.

It is a super-2 number, since 2×3561095558081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3561095558021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780547779040 + 1780547779041.

It is an arithmetic number, because the mean of its divisors is an integer number (1780547779041).

Almost surely, 2^{3561095558081} is an apocalyptic number.

It is an amenable number.

3561095558081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561095558081 is an equidigital number, since it uses as much as digits as its factorization.

3561095558081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480000, while the sum is 56.

The spelling of 3561095558081 in words is "three trillion, five hundred sixty-one billion, ninety-five million, five hundred fifty-eight thousand, eighty-one".